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通过对复合材料夹层结构T型接头的三种连接方式进行研究,记录胶接、胶-缝混合连接和胶-螺混合连接在竖向荷载作用下的破坏过程和破坏模式、最大位移和极限荷载,并且研究缝合直径和缝合密度对接头极限抗剪承载力的影响。结果表明,夹层结构根部是试件破坏的薄弱部位,在结构设计时应重点考虑。胶-螺混合T型连接能明显提高夹层结构的极限抗剪承载力,但增加了接头的质量。胶-缝混合T型连接能够提高夹层结构极限抗剪承载力,且接头质量较轻,具有很好的应用前景;缝线直径和密度对承载力影响很大,可以进一步研究。
Through the study of three connection modes of T-joints in composite sandwich structure, the failure process and failure modes under the vertical load were recorded. The maximum displacement and ultimate load The effects of suture diameter and suture density on the ultimate shear strength of the joint were studied. The results show that the root of the sandwich structure is the weak part of specimen destruction and should be emphatically considered in the structural design. The glue-spiro mixed T-connection can obviously improve the ultimate shear capacity of the sandwich structure, but increases the quality of the joint. Glue-stitched hybrid T-joints can improve the ultimate shear capacity of sandwich structures with lighter joints and have good application prospects. Suture diameter and density have a great influence on the bearing capacity and can be further studied.